JP4695231B2 - Treatment table system - Google Patents

Description

  The present invention relates to a treatment table system used for a particle beam therapy apparatus, and more particularly to a therapy table system that supports the use of diagnosis of a three-dimensional diagnosis apparatus for particle beam therapy.

Conventionally, radiotherapy using X-rays or gamma rays, which is widely used as a treatment method, has a high amount of absorbed radiation regardless of the depth from the surface of the human body. Will also affect. In contrast, particle beam therapy using proton beams or heavy ion beams has a characteristic that the amount of absorption reaches a peak at a certain depth from the surface of the human body, so it concentrates only on the affected area while suppressing damage to normal cells. It is an effective treatment method that can be irradiated.
However, the particle beam therapy system is a large-sized device that irradiates the affected part with a charged particle beam emitted from a large accelerator with high energy, and the arrangement of related devices in the irradiation system is uniquely determined, and irradiation with a particle beam irradiation port is provided. A port cannot be placed arbitrarily.

  It is preferable to use a three-dimensional diagnostic apparatus typified by a CT apparatus for positioning diagnosis of an affected part having a three-dimensional shape, but the particle beam irradiation port is arranged so as not to interfere with a large three-dimensional diagnostic apparatus. Have difficulty. For this reason, in order to use the diagnosis of the three-dimensional diagnostic apparatus for the particle beam therapy, after positioning the affected part on the treatment table of the three-dimensional diagnosis apparatus and making a treatment plan, the subject becomes the treatment table of the particle beam therapy apparatus. It was necessary to move up and position the affected area again to perform treatment, and the positioning accuracy was reduced.

Conventional treatment table (bed) systems that perform positioning using a common bed without moving the subject to different treatment tables of a plurality of devices such as a diagnosis device and a treatment device include the following.
This system includes a bed commonly used for a plurality of medical devices, means for supporting the bed so as to be movable in a one-dimensional direction, and controlling the movement of the bed only in the one-dimensional direction. Means for individually positioning the specimen at the isocenter of each of the plurality of medical devices. The positions of the isocenters of the plurality of medical devices in the remaining two-dimensional directions are set to be the same (see, for example, Patent Document 1).

JP 2005-052308 A

  In the treatment table system shown in Patent Document 1, after positioning an affected part at an isocenter such as a three-dimensional diagnostic apparatus, the treatment table is moved by a simple operation to position the affected part at the isocenter of the treatment apparatus. However, in order to position the affected area at the isocenter, not only alignment by the treatment table but also alignment of the irradiation port of the treatment apparatus is necessary, and it cannot be applied to a particle beam treatment apparatus in which the position of the irradiation port is determined. It was a thing.

  The present invention has been made to solve the above-described problems, and can make it easy to position an affected area at an isocenter with high accuracy by utilizing the diagnosis of a three-dimensional diagnostic apparatus for particle beam therapy. The purpose is to provide a stand system.

The treatment table system according to the present invention comprises:
In a treatment table system of a particle beam therapy apparatus using a three-dimensional diagnosis for particle beam therapy in which a charged particle beam emitted from an accelerator is irradiated with high energy to an affected area of a subject,
A mounting plate for mounting the subject;
An affected part positioning mechanism for positioning the affected part at an isocenter of the particle beam therapy system by supporting the above-mentioned placed plate and moving the above-mentioned placed board;
A treatment table moving mechanism for moving the treatment table provided with the affected part positioning mechanism and the mounting plate described above between the diagnosis position of the three-dimensional diagnosis device and the treatment position of the particle beam treatment device;
The affected part positioning mechanism is configured to move the mounting plate according to a combination of a major axis direction, a minor axis direction, a vertical direction, a rotation direction with the major axis direction as an axis, and a rotation direction with the minor axis direction as an axis. Composed of a plurality of members arranged in
The diseased part positioning mechanism is configured such that, when the treatment table is at the diagnostic position of the three-dimensional diagnostic apparatus, the isocenter of the three-dimensional diagnostic apparatus is used as the virtual isocenter of the particle beam therapeutic apparatus, and the position of the particle beam irradiation port of the particle beam therapeutic apparatus Assuming particle beam therapy based on the particle beam irradiation direction, based on the image of the affected part by the three-dimensional diagnostic apparatus, the affected part is positioned at the virtual isocenter,
The treatment table moving mechanism includes a plurality of members that are driven to rotate or translate independently of each other in a predetermined direction,
The treatment table moving mechanism is configured to reduce the rotation radius of the placement plate while maintaining the state of the placement plate at the time when the affected portion is positioned at the virtual isocenter and the position of the affected portion positioning mechanism. The translation plate and the affected part positioning mechanism are rotated after being translated in advance so that the center of the placement plate approaches the rotation axis of the treatment table moving mechanism,
Thereafter, the placement plate and the affected part positioning mechanism are translated to the treatment position of the particle beam therapy system to position the affected part at the isocenter of the particle beam therapy system.

  In the treatment table system according to the present invention, the treatment table is used for both the three-dimensional diagnosis and the particle beam treatment, and the smallest possible space is used while maintaining the position of the affected part using the diagnosis result of the three-dimensional diagnosis apparatus. By simply moving the treatment table to the particle beam treatment position, the affected part can be easily positioned with high accuracy at the isocenter of the particle beam treatment apparatus.

It is a figure which shows schematic structure of the treatment table system by Embodiment 1 of this invention in the time of a three-dimensional diagnosis, and the time of particle beam treatment. It is a figure explaining the affected part positioning mechanism of the treatment table system by Embodiment 1 of this invention. It is a side view of the treatment table system shown in FIG. It is a figure which shows the structure of the accelerator used for the particle beam therapy by Embodiment 1 of this invention. It is a figure explaining the structure and operation | movement of a treatment table moving mechanism in the treatment table system by Embodiment 2 of this invention. It is a figure explaining the structure and operation | movement of a treatment table moving mechanism in the treatment table system by Embodiment 2 of this invention. It is a figure explaining the structure and operation | movement of a treatment table moving mechanism in the treatment table system by Embodiment 2 of this invention. It is a figure explaining the structure and operation | movement of a treatment table moving mechanism in the treatment table system by Embodiment 2 of this invention. It is a figure explaining operation | movement of the treatment table moving mechanism in the treatment table system by Embodiment 3 of this invention. It is a figure explaining operation | movement of the treatment table moving mechanism in the treatment table system by another example of Embodiment 3 of this invention.

Embodiment 1 FIG.
A treatment table system according to Embodiment 1 of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) are top views showing a schematic configuration of a treatment table system according to Embodiment 1 of the present invention. Moreover, the side view of the treatment table system shown to Fig.1 (a) and FIG.1 (b) is shown to Fig.2 (a) and FIG.2 (b). In particular, FIGS. 1 (a) and 2 (a) are diagrams in which the treatment table 5 is arranged at a three-dimensional diagnosis position, and FIGS. 1 (b) and 2 (b) show the treatment table 5 at the particle beam treatment position. FIG.
As shown in the figure, the treatment table system includes a placement plate 2 on which a patient 1 as a subject is placed, and an affected part that supports the placement plate 2 and moves the placement plate 2 to position the affected part A. A treatment table 5 including a first affected part positioning mechanism 3 and a second affected part positioning mechanism 6 serving as a positioning mechanism, and a treatment table moving mechanism 4 disposed below the first affected part positioning mechanism 3 is provided. Moreover, the control part (not shown) which controls the 1st, 2nd affected part positioning mechanism 3 and 6 and the treatment table moving mechanism 4 is provided.

  The first affected part positioning mechanism 3 includes a plurality of members 3a to 3c, supports the mounting plate 2, and has a major axis direction, a minor axis direction, a rotation direction about the major axis direction, and a minor axis direction as an axis. The mounting plate 2 is moved by the combination of the rotation directions described above, and the affected area A is positioned other than the vertical direction. The second affected part positioning mechanism 6 is composed of a support leg 6, and the support leg 6 moves up and down to move the mounting plate 2 in the up and down direction, thereby positioning the affected part A in the up and down direction.

  The treatment table moving mechanism 4 moves the treatment table 5 between the diagnosis position of the three-dimensional diagnosis device 16 and the treatment position of the particle beam treatment device, and is independent of the first and second affected part positioning mechanisms 3 and 6. Driven. In this case, the rotary table 4a and the pedestal 4b that is disposed on the rotary table 4a and rotates integrally with the rotary table 4a are configured. The treatment table moving mechanism 4 supports the first affected part positioning mechanism 3 below the first affected part positioning mechanism 3, and the treatment table moving mechanism 4, the first affected part positioning mechanism 3, and the mounting plate 2 are integrated. The treatment table 5 is moved by rotating to.

  As shown in FIGS. 1 (a) and 2 (a), when the treatment table 5 is at the diagnostic position of the three-dimensional diagnostic apparatus 16, the isocenter of the three-dimensional diagnostic apparatus 16 is used as the virtual isocenter 7 of the particle beam therapy apparatus. The affected area A is positioned at the virtual isocenter 7 by the first and second affected area positioning mechanisms 3 and 6. At this time, the three-dimensional diagnostic apparatus 16 is disposed at a position where it does not interfere with the irradiation port 9 including the particle beam irradiation port 9a of the particle beam therapy apparatus.

  The positioning of the affected area A to the virtual isocenter 7 assumes particle beam therapy, that is, a positioning operation necessary for particle beam therapy at the isocenter 8 of an actual particle beam therapy system. For this reason, the mounting plate 2 is moved on the assumption of the particle beam treatment based on the position of the particle beam irradiation port 9a and the particle beam irradiation direction in which the arrangement is determined, and not only the long axis direction, the short axis direction, and the vertical direction Positioning is performed including roll adjustment for moving in the rotation direction about the major axis direction and pitch adjustment for moving in the rotation direction about the minor axis direction. Since this virtual isocenter 7 is an isocenter of the three-dimensional diagnostic device 16, positioning is performed based on the three-dimensional diagnostic image by the three-dimensional diagnostic device 16, and positioning is performed with high accuracy based on the three-dimensional shape of the affected area A. it can.

FIGS. 3A, 3 </ b> B, and 3 </ b> C are side views from three directions for explaining the operation by the first affected part positioning mechanism 3.
The member 3a of the first affected part positioning mechanism 3 performs roll adjustment (see FIG. 3A) and pitch adjustment (see FIG. 3B) with respect to the mounting plate 2. The member 3b moves the mounting plate 2 together with the member 3a in the long axis direction (see FIG. 3B), and the member 3c moves the mounting plate 2 together with the members 3a and 3b in the short axis direction (FIG. 3). (See (c)).

The treatment table moving mechanism 4 maintains the state of the mounting plate 2 and the first and second affected part positioning mechanisms 3 and 6 at the time when the affected part A is positioned at the virtual isocenter 7 and moves the treatment table 5 to the particle. It moves to the treatment position of a line therapy apparatus, and will be in the state shown in FIG.1 (b) and FIG.2 (b). That is, the affected part A that has been at the position of the virtual isocenter 7 is moved to the position of the isocenter 8 of the particle beam therapy system and positioned at the isocenter 8. In this case, the movement of the treatment table 5 is a rotational movement that rotates by 180 degrees around the rotary shaft 10 passing through the intermediate point between the virtual isocenter 7 and the isocenter 8, and the center of the rotary table 4 a is on the rotary shaft 10. The support legs 6 arranged in the lower layer of the rotary table 4a are fixed without rotating, but are symmetrical with respect to the rotary shaft 10.
When the treatment table 5 moves, it is assumed that the three-dimensional diagnostic device 16 is retracted backward so as not to prevent the movement of the treatment table 5. In FIGS. 1A and 1B, the irradiation port 9 is close to the treatment table 5 for convenience, but is fixed to the treatment room wall surface at a position that does not hinder the rotation of the treatment table 6.

When the affected area A is positioned at the isocenter 8 of the particle beam therapy apparatus, the particle beam therapy apparatus performs treatment by irradiating the affected area A with the particle beam from the particle beam irradiation port 9a.
The main body of the particle beam therapy apparatus appropriately irradiates the affected area A with a large accelerator 20, a transport system that introduces a charged particle beam emitted from the accelerator 20 into the irradiation chamber, and a particle beam that is the supplied charged particle beam. An irradiation system is provided and a particle beam is irradiated from the irradiation port 9a. FIG. 4 is a diagram showing a schematic configuration of the accelerator 20. As shown in the figure, accelerated particles are extracted from the ion source 21 as a charged particle beam, accelerated to a certain energy using a linear accelerator 22, and then injected into a circular orbit from the incident device 23a. The charged particle beam passes through the acceleration cavity 24 every time it goes around the circular orbit, and is accelerated and energy is increased each time. In accordance with this, the magnetic field is increased and adjusted so as to go around the same circular orbit. When the maximum energy is reached, the energy is taken out of the circular track from the take-out device 23b.

  In this embodiment, the first and second diseased part positioning mechanisms 3 and 6 are configured such that the isocenter of the three-dimensional diagnostic device 16 is replaced with the virtual isocenter 7 of the particle beam therapeutic device when the treatment table 5 is in the diagnostic position of the three-dimensional diagnostic device 16. Assuming particle beam therapy, the affected area A is positioned at the virtual isocenter 7 based on the image of the affected area A by the three-dimensional diagnostic device 16. This positioning operation includes not only the major axis direction, minor axis direction, and vertical direction, but also roll adjustment that moves in the rotation direction around the major axis direction, and pitch adjustment that moves in the rotation direction around the minor axis direction. It is positioned including.

In normal three-dimensional diagnosis, when positioning the affected part at the isocenter of the three-dimensional diagnostic apparatus, a roll adjustment that moves the bed on which the subject is mounted in the rotation direction about the major axis direction, and the minor axis direction The pitch adjustment for moving in the rotation direction around the axis is unnecessary, and the bed of the three-dimensional diagnostic apparatus does not have such a positioning adjustment function.
In the treatment table system according to this embodiment, assuming the particle beam treatment in the particle beam therapy apparatus in which the irradiation port 9 cannot be aligned, the affected part A is positioned at the virtual isocenter 7, so that the actual particle beam therapy apparatus Positioning operation required at the time of particle beam therapy at the isocenter 8 can be performed. Further, this positioning operation is performed based on the diagnostic image while performing the three-dimensional diagnosis by the three-dimensional diagnostic device 16, and can be positioned with high accuracy based on the three-dimensional shape of the affected part A. Further, the three-dimensional diagnostic device 16 can be arranged without interfering with the irradiation port 9 of the particle beam therapy apparatus, and the affected part A can be positioned at the virtual isocenter 7 by applying to the existing particle beam therapy apparatus.

  Further, the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6 at the time of positioning when the affected part A is positioned at the virtual isocenter 7, Move to the treatment position of the particle beam therapy system. Since the treatment table moving mechanism 4 is driven independently of the first and second affected part positioning mechanisms 3 and 6, when the treatment table 5 is moved by the treatment table moving mechanism 4, the mounting plate 2 and the first and second treatment plates 4 are moved. The affected part positioning mechanisms 3 and 6 can be maintained. Therefore, the treatment table 5 can not only maintain the positioning accuracy between the diagnosis position and the treatment position, but also at the diagnosis position, the treatment position, and further in the middle of movement, the mounting plate 2 and the first and second affected part positioning mechanisms. There is no change in the state of deflection, deformation, etc. For this reason, a change in the posture of the subject 1 and movement of the organ can be prevented, and the affected area A can be positioned with high accuracy at the isocenter 8 of the particle beam therapy system. In addition, although the support leg 6 which is the 2nd affected part positioning mechanism 6 does not rotate, since it is comprised by the symmetrical shape with respect to the rotating shaft 10, bending, a deformation | transformation, etc. are carried out by the diagnostic position and the treatment position. There is no change in state.

  The treatment table 5 can be moved simply by rotating it 180 degrees on a two-dimensional plane, moving the affected area A at the position of the virtual isocenter 7 to the position of the isocenter 8 of the particle beam therapy system. And the effect of preventing the change in the body position of the subject 1 and the movement of the organ are enhanced. In addition, the treatment table moving mechanism 4 also has no change in the shape and the relative position in the treatment table 5 between the diagnosis position and the treatment position. There is no change in the state of deflection, deformation, etc., and the affected area A can be positioned with higher accuracy at the isocenter 8 of the particle beam therapy system.

In the above embodiment, the isocenter of the three-dimensional diagnostic apparatus 16 is the virtual isocenter 7 of the particle beam therapy apparatus. However, since the three-dimensional diagnostic apparatus 16 is movable, it is within the diagnosis possible range of the three-dimensional diagnostic apparatus 16. After setting the virtual isocenter 7, the 3D diagnostic apparatus 16 may be moved so that the isocenter of the 3D diagnostic apparatus 16 coincides with the virtual isocenter 7.
In this case, in a state where the treatment table 5 is arranged at the treatment position of the particle beam treatment apparatus, for example, position detection provided in the first and second affected part positioning mechanisms 3 and 6 optically using, for example, a laser pointer or the like. The position information of the isocenter 8 is recorded mechanically or electronically using a sensor. Then, the treatment table 5 is arranged in the vicinity of the three-dimensional diagnosis device 16 by the treatment table moving mechanism 4, and the virtual isocenter 7 is within the diagnosis possible range of the three-dimensional diagnosis device 16 based on the recorded position information of the isocenter 8. Set. In this case, the virtual isocenter 7 is set so that the isocenter 8 and the virtual isocenter 7 are symmetric with respect to the rotation axis 10 in the treatment table 5.

Embodiment 2. FIG.
Hereinafter, a treatment table system according to Embodiment 2 of the present invention will be described with reference to FIGS.
The second embodiment is different from the first embodiment in the treatment table moving mechanism 4. The mounting plate 2 and the first affected part positioning mechanism 3 are the same as those in the first embodiment. The first affected part positioning mechanism 3 supports the mounting plate 2 and has a long axis direction and a short axis. The placement plate 2 is moved by a combination of the direction, the rotation direction with the major axis direction as the axis, and the rotation direction with the minor axis direction as the axis, thereby positioning the affected part A other than the vertical direction. Note that the placement plate 2 and the first affected part positioning mechanism 3 are simply illustrated for convenience.
The second affected part positioning mechanism 6a including the support leg 6a has the same function as that of the first embodiment in that the affected part A is moved in the vertical direction by vertically extending and contracting, and the affected part A is positioned in the vertical direction. There is a wide structure.

The treatment table moving mechanism 4 supports the first affected part positioning mechanism 3 below the first affected part positioning mechanism 3, and is driven independently of the first and second affected part positioning mechanisms 3 and 6a. The placement plate 2 and the first and second affected part positioning mechanisms 3 at the time when the affected part A is positioned at the virtual isocenter 7 between the diagnosis position of the three-dimensional diagnosis apparatus 16 and the treatment position of the particle beam therapy apparatus. The treatment table 5 is moved while maintaining the state of 6a.
5 (a) and 5 (b) are diagrams in which the treatment table 5 is arranged at a three-dimensional diagnosis position, and FIGS. 8 (a) and 8 (b) show the treatment table 5 at the particle beam treatment position. FIG. 6 (a), 6 (b), 7 (a), 7 (b), and 8 (c), the treatment table 5 moves from the three-dimensional diagnosis position to the particle beam treatment position. The stage in the middle of doing is illustrated. 5 (a), 6 (a), 7 (a), and 8 (a) are top views, and FIG. 5 (b), FIG. 6 (b), FIG. 7 (b), and FIG. 8 (b) and FIG. 8 (c) are side views.
As shown in the figure, the treatment table moving mechanism 4 includes a plurality of members 4c to 4f arranged hierarchically in the height direction. In addition, the member 4c is arrange | positioned on the support leg 6a, supports the upper layer members 4d-4f, and this itself does not move.

  As shown in FIGS. 5A and 5B, when the treatment table 5 is at the diagnostic position of the three-dimensional diagnostic apparatus 16, the isocenter of the three-dimensional diagnostic apparatus 16 is used as the virtual isocenter 7 of the particle beam therapy apparatus. The affected area A is positioned at the virtual isocenter 7 by the first and second affected area positioning mechanisms 3 and 6a. The state shown in the figure is a state in which, after the affected part A is positioned at the virtual isocenter 7, the three-dimensional diagnostic device 16 is retracted to the rear position for the movement of the treatment table 5.

  The treatment table moving mechanism 4 holds the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 5 is illustrated. 6 (a) and move as shown in FIG. 6 (b). At this time, due to the member 4f of the treatment table moving mechanism 4 disposed on the bottom surface of the first affected part positioning mechanism 3, the mounting plate 2, the first affected part positioning mechanism 3 and the member 4f are integrated in the right direction in the figure. Move to. Thereby, the dimension of the major axis direction of the whole treatment table 5 reduces. The member 4f may be provided on the upper surface side of the lower member 4e. In this case, the mounting plate 2 and the first affected part positioning mechanism 3 may be moved integrally by driving the member 4f. .

Next, the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 5 is moved. Further, as shown in FIG. 7A and FIG. At this time, the member 4e of the treatment table moving mechanism 4 is rotationally driven, and the placement plate 2, the first affected part positioning mechanism 3, and the members 4f and 4e are integrally rotated 180 degrees around the rotation shaft 11. The movement by this rotation can be performed without interfering with the irradiation port 9 because the radius in the major axis direction of the entire treatment table 5 is reduced in the previous stage, so that the rotation radius becomes small.

Next, the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 5 is moved. Further, as shown in FIG. At this time, due to the member 4f of the treatment table moving mechanism 4 disposed on the bottom surface of the first affected part positioning mechanism 3, the mounting plate 2, the first affected part positioning mechanism 3 and the member 4f are integrated in the right direction in the figure. Move to. This movement is relatively equivalent to the operation of restoring the movement shown in FIGS. 6 (a) and 6 (b).

Next, the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 5 is moved. Further, as shown in FIG. 8A and FIG. At this time, the mounting plate 2, the first affected part positioning mechanism 3, and the members 4f, 4e, and 4d are integrally moved rightward in the drawing by the member 4d of the treatment table moving mechanism 4. Then, the affected area A is moved to the position of the isocenter 8 of the particle beam therapy system and positioned at the isocenter 8.

  In this embodiment, the treatment table moving mechanism 4 is in a stage where the members 4d to 4f are sequentially driven by mutually independent driving and the treatment table 5 is moving from the three-dimensional diagnosis position to the particle beam treatment position. , Change the overall shape. Then, when the treatment table 5 reaches the particle beam treatment position, that is, when the affected part A is moved to the position of the isocenter 8 of the particle beam treatment apparatus, the shape of the treatment table moving mechanism 4 and the treatment table 5 The relative position is equivalent to the time when the affected part A is positioned at the virtual isocenter 7. For this reason, as described above, the degree of freedom of movement is increased, for example, the rotational radius can be reduced during rotational movement, and the degree of freedom in design is improved.

The treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time of positioning when the affected part A is positioned at the virtual isocenter 7 as in the first embodiment. Then, the treatment table 5 is moved to the treatment position of the particle beam treatment apparatus. Since the treatment table moving mechanism 4 is driven independently of the first and second affected part positioning mechanisms 3 and 6a, the placement plate 2 and the first and second plates are moved when the treatment table 5 is moved by the treatment table moving mechanism 4. The affected part positioning mechanisms 3 and 6a can be maintained. Therefore, the treatment table 5 can not only maintain the positioning accuracy between the diagnosis position and the treatment position, but also at the diagnosis position, the treatment position, and further in the middle of movement, the mounting plate 2 and the first and second affected part positioning mechanisms. There is no change in the state of deflection or deformation of 3, 6a.
As shown in FIGS. 5 and 8, the state of the treatment table 5 at the particle beam treatment position and the three-dimensional diagnosis position is 180 degrees rotationally symmetric with respect to the center of the support leg 6a as an equivalent state. Thereby, the treatment table 5 as a whole can be positioned with high accuracy in the isocenter 8 of the particle beam therapy system without any change in the state of deflection or deformation between the diagnosis position and the treatment position.

  In addition, the member (support leg 6a, member 4c) which does not move in the treatment table 5 is comprised by the symmetrical shape with respect to the axis | shaft of movement. In this case, the treatment table 5 is 180-degree rotationally symmetric with respect to the center of the support leg 6a, and thus has a symmetrical shape with respect to the axis.

Embodiment 3 FIG.
Since the arrangement of the three-dimensional diagnostic apparatus 16 is restricted by the shape and size of the particle beam treatment room, the case where the arrangement of the three-dimensional diagnostic apparatus 16 is different from the first and second embodiments will be described below.
The third embodiment is different from the first and second embodiments in the configuration of each part in the treatment table moving mechanism 4, but the shape and operation of each part of the treatment table moving mechanism 4 are omitted for the sake of convenience, and the entire treatment table 5 is provided. The state of movement will be described with reference to FIGS. 9 (a) to 9 (c).
9A is a top view in which the treatment table 5 is arranged at the three-dimensional diagnosis position, and FIG. 9C is a top view in which the treatment table 5 is arranged at the particle beam treatment position. FIG. 9B shows a stage in the middle of the treatment table 5 moving from the three-dimensional diagnosis position to the particle beam treatment position.

  As shown in FIG. 9A, the treatment table 5 is located at the diagnostic position of the three-dimensional diagnostic apparatus 16 disposed opposite to the particle beam irradiation port 9. At this time, the isocenter of the three-dimensional diagnostic device 16 is used as the virtual isocenter 7 of the particle beam therapy system, and the affected part A is positioned at the virtual isocenter 7 by the first and second affected part positioning mechanisms 3 and 6 (6a).

Then, the treatment table 5 is rotated 90 degrees clockwise around the position of the isocenter 8 of the particle beam treatment apparatus, and the state shown in FIG. 9B is obtained. When the treatment table 5 moves, it is assumed that the three-dimensional diagnostic device 16 is retracted backward so as not to prevent the movement of the treatment table 5.
Next, as in the first embodiment, the treatment table 5 is rotated by 180 degrees around the rotation axis 10 passing through the intermediate point between the affected area A and the isocenter 8, and the state shown in FIG. 9C is obtained. As a result, the affected area A is moved to the position of the isocenter 8 of the particle beam therapy system and positioned at the isocenter 8.

  Also in this embodiment, the treatment table moving mechanism 4 (not shown) is in the state of the placement plate 2 and the affected part positioning mechanism at the time of positioning when the affected part A is positioned at the virtual isocenter 7 as in the first and second embodiments. And the treatment table 5 is moved to the treatment position of the particle beam treatment apparatus. In addition, the state of the treatment table moving mechanism 4 at the time when the affected area A is moved to the position of the isocenter 8 of the particle beam therapy system is set to be equivalent to the time when the affected area A is positioned at the virtual isocenter 7. For this reason, as in the first and second embodiments, the entire treatment table 5 has no change in the state of deflection, deformation, etc. between the diagnosis position and the treatment position, and the affected area A is isolated from the isocenter 8 of the particle beam therapy system. Can be positioned with high accuracy.

  In addition, as shown in FIG. 10, you may lay the rail 14 which translates the treatment table 1 whole on the floor of a treatment room. In this case, after moving the treatment table in the same manner as in FIG. 2, the treatment table 5 is moved to the treatment position of the particle beam treatment apparatus by translating on the rail 14.

  Further, in each of the above embodiments, the support leg 6 (6a) is used to support from below, but it may be supported by hanging from the upper layer. Also in this case, the treatment table moving mechanism 4 does not change to move the treatment table 5 while supporting the first affected part positioning mechanism 3 in the lower layer of the first affected part positioning mechanism 3. 2, the entire treatment table 5 does not change in the state of deflection or deformation at the diagnosis position and the treatment position, and the affected area A can be positioned with high accuracy at the isocenter 8 of the particle beam treatment apparatus.

  In the first to third embodiments, the affected part A is positioned at the virtual isocenter 7 and then the treatment table 5 is moved to be positioned at the isocenter 8 of the particle beam therapy system. However, the affected part is determined based on the previous positioning information. A may be positioned at the isocenter 8. In this case, a means for holding the positioning information of the affected part positioning mechanisms 3 and 6 (6a) is provided, and positioning is performed on the isocenter 8 using the previously held positioning information. Then, the positioning of the affected area A is corrected by the affected area positioning mechanisms 3 and 6 (6a) on the basis of an image obtained by an X-ray imaging apparatus which is a diagnostic apparatus normally provided in the particle beam therapy system. Thereby, when performing particle beam therapy to the same affected part A of the subject 1 several times, the affected part A can be positioned at the isocenter 8 easily, quickly and with high accuracy.

  The present invention can be used for a particle beam therapy system with a small degree of freedom in the position of the irradiation port, such as a gantry type particle beam therapy system in which the irradiation port is fixed or only movable along the short axis.

Claims (3)

In a treatment table system of a particle beam therapy apparatus using a three-dimensional diagnosis for particle beam therapy in which a charged particle beam emitted from an accelerator is irradiated with high energy to an affected area of a subject,
A mounting plate for mounting the subject;
An affected part positioning mechanism for positioning the affected part at an isocenter of the particle beam therapy system by supporting the above-mentioned placed plate and moving the above-mentioned placed board;
A treatment table moving mechanism for moving the treatment table provided with the affected part positioning mechanism and the mounting plate described above between the diagnosis position of the three-dimensional diagnosis device and the treatment position of the particle beam treatment device;
The affected part positioning mechanism is configured to move the mounting plate according to a combination of a major axis direction, a minor axis direction, a vertical direction, a rotation direction with the major axis direction as an axis, and a rotation direction with the minor axis direction as an axis. Composed of a plurality of members arranged in
The diseased part positioning mechanism is configured such that, when the treatment table is at the diagnostic position of the three-dimensional diagnostic apparatus, the isocenter of the three-dimensional diagnostic apparatus is used as the virtual isocenter of the particle beam therapeutic apparatus, and the position of the particle beam irradiation port of the particle beam therapeutic apparatus Assuming particle beam therapy based on the particle beam irradiation direction, based on the image of the affected part by the three-dimensional diagnostic apparatus, the affected part is positioned at the virtual isocenter,
The treatment table moving mechanism includes a plurality of members that are driven to rotate or translate independently of each other in a predetermined direction,
The treatment table moving mechanism is configured to reduce the rotation radius of the placement plate while maintaining the state of the placement plate at the time when the affected portion is positioned at the virtual isocenter and the position of the affected portion positioning mechanism. The translation plate and the affected part positioning mechanism are rotated after being translated in advance so that the center of the placement plate approaches the rotation axis of the treatment table moving mechanism,
Then, the treatment table system characterized by translating the placement plate and the affected part positioning mechanism to the treatment position of the particle beam therapy system to position the affected part at the isocenter of the particle beam therapy system. Means for setting the virtual isocenter within a diagnosis possible range by the three-dimensional diagnostic apparatus, and the image of the affected part is a diagnostic image obtained by superimposing the isocenter of the three-dimensional diagnostic apparatus on the virtual isocenter The treatment table system according to claim 1. The affected area positioning mechanism includes means for positioning the affected area at an isocenter of the particle beam therapy system based on an image of the affected area by an X-ray imaging apparatus, and holding positioning information of the affected area positioning mechanism. Based on the image of the affected area by the X-ray imaging apparatus after the treatment table positions the affected area at the isocenter of the particle beam therapy apparatus based on the held positioning information at the treatment position of the particle beam therapy apparatus. The treatment table system according to claim 1 or 2, wherein the position of the affected part is corrected.

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